AlQa'dah 4, 1433, Sep 20, 2012, SPA -- The death toll following an explosion and fire at a gas plant run by the state oil company in Mexico rose to 30 Thursday when a worker died of his injuries. According to dpa, the oil company Petroleos Mexicanos (Pemex) confirmed the death. The man had been taken from the north-eastern Reynosa near the US border to a hospital Mexico City where he died. Most of the dead were workers of Pemex subcontractors. Around 20 people were being treated for injuries, while seven people were still missing. The blast occurred early Tuesday near a highway that connects the cities of Monterrey and Reynosa, in the state of Tamaulipas.